Home / 21,056,806.78-31,494,028.66-12,400,272.59

Finding the Fourth Proportional to 21,056,806.78, 31,494,028.66 and 12,400,272.59

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Solution

The fourth proportional to 21,056,806.78, 31,494,028.66 and 12,400,272.59 is: 18,546,712.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056,806.78 : 31,494,028.66 = 12,400,272.59 : x
  2. Step 2: Convert to fraction form
    21,056,806.78/31,494,028.66 = 12,400,272.59/x
  3. Step 3: Cross multiply
    21,056,806.78x = 31,494,028.66 × 12,400,272.59
  4. Step 4: Simplify right side
    21,056,806.78x = 390,534,540,270,904.19
  5. Step 5: Solve for x
    x = 390,534,540,270,904.19/21,056,806.78
  6. Step 6: Final answer
    x = 18,546,712.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.